Carbon pile regulator



Oct. 13, 1953 j Qvy. NElLD l 2,655,581

CARBON PILE REGULATOR Filed Sept. 2l, 1951 FIG. 1`

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W/Ll. /M 6. NE/LD Patented Oct. 13, 1953 CARBON PILE REGULATOR William G. Neild, Fairl Bendix Aviation Corp awn, N. J., assignor to oration,

Teterboro, N. J.,

a corporation of Delaware Application september 21, 1951, serial No. 247,683

2 Claims.

The present invention relates to carbon pile regulators and more particularly to a contact plug for use in a carbon pile regulator.

In carbon pile regulators, it is often necessary to replace the carbon pile and the contact plugs. Replacement of the carbon pile and contact plug on the iixed or pile screw end of the regulator is comparatively simple by merely removing the pile adjusting screw. Heretofore, it has been necessary to dismantle the unit in order to replace the contact plug on the armature or movable end. Not only is the dismantling complicated, but often serious damage occurs to the regulator coil assembly and other parts in the process of dismantling and reassembly.

The present invention provides a contact plug that may be installed and removed from the armature assembly by merely removing the pile screw, upper contact plug and carbon pile. Thus, the necessity of dismantling the unit to replace the contact plug on the armature assembly is removed.

An object of the invention is to provide an improved carbon pile regulator.

Another object of the invention is to provide an improved carbon pile regulator in which the contact plugs may be easily replaced.

Another object of the invention is to provide an improved contact plug for a carbon pile regulator.

Another object of the invention is to provide means for replacing the contact plugs of a carbon pile regulator without disassembly of the unit.

Another object of the invention is to provide a method of replacing contact plugs of a carbon pile regulator without dismantling the unit.

The above and other objects and features of the invention will appear more fully hereinafter from a consideration of the following description taken in connection with the accompanying drawing wherein one embodiment of the invention is illustrated by way of example.

In the drawing:

Figure l is a cutaway View of a carbon pile regulator illustrating the invention.

Figure 2 is a cross-sectional view of the regulator of Figure 1 showing the contact plug and tool for removing the plug.

Figure 3 is a perspective view of the contact plug of Figures l and 2.

Figure 4 is a perspective view of the insert for the contact plug.

1Referring now to the drawing, a carbon pile regulator is indicated generally by the numeral 5 and has an electromagnet coil 6; armature assembly 'I and carbon pile 8. A casing 9 encloses the electromagnet coil 6 and supports the armature assembly 1. The'casing 9 is formed of a suitable ferromagnetic material. A carbon pile housing IG having heat reducing ns II is secured to the casing 9 by screws I2. A plate I3 is formed integral with the housing I0 and fastened thereto by screws I4 is a second plate I5.

The plate I5 is insulated from the plate I3 by a suitable insulating member I6. A cap I 'I is secured to the plate I5 by screws I8 and has a threaded portion I9 adapted to receive a pile adjusting screw 20.

Mounted in the housing I0 and extending longitudinally therein is a tube 2| of suitable nonconducting material. The tube 2| carries carbon disc 22 forming the carbon pile 8. Contact plugs 23 and 24 are positioned at opposite ends of the carbon pile 8. The contactplug 23, not visible in the drawings, is positioned between the pile 8 and the pile adjusting screw 20 and turning the screw 2D adjusts the initial pressure applied to the pile 8.

The contact plug 24, provided at the opposite end of the pile 8, is mounted in a cup-shaped member 25 formed in an electrical conductor plate 26. The plate 26 is secured to the armature assembly 'I by screws 21. The contact plug 24 comprises a ring-like member 28 of carbon o1' the like and a metal insert 29. 'I'he member 28 may have a coating of silver and is proportioned to have a tight t with the cup-shaped member 25. The metal insert 29 has a threaded portion 30, the function of which will be explained later.

In order to remove the contact plug 24, without disassembling the unit 5, the screw 20 is removed and the contact plug 23 and carbon pile 8 are withdrawn through the opening in the threaded portion I9 from which the screw 23 was removed. A tool 3l is inserted in the opening with the tube 2l serving as a guide. The tool 3| comprises a cylindrical member 32 having a counterbore portion 33 adapted to lit over the contact plug 24 and an opening 34 extending longitudinally thereof. A rod-like member 35 having a threaded portion 36 on one end thereof is adapted to t freely in the opening 34. The other end of member 35 terminates in a block 36 and has a cross member 31 extending therefrom. A screw 38 is threaded through the block 36 and is adapted to force the block 36 away from the member 32.

The counterbore portion 33 of the member 32 :lits over the contact plug 24 with the edges of the counterbore portion 33 resting on the cup 25. The rod member is threaded into the threaded portion 30 of the insert 29 and the screw 38 turned in a direction to force the block 36 away from the member 32 thereby pulling the plug 24 from the cup 25. The tool 3| is then removed and the plug 24 taken off the member 34.

A newplug 24'maybe insertedinthe :tube '2l and pressed in place by reversing the member 3l and using the ilat portion thereof to press the plug 24 into the cup 25. The carbon pile 8 and contact plug 23 may then be insertedandthe screw 20 replaced.

While a set screw 38 has been iillustrated as means for forcing the block.36 and member fil apart, it is understood that the means could be a cam, lever or any other conventional means.

Thus, by providing a contact plug'having an insert, replacement of the plug is easily Iachieved by merely removing the carbon pile adjusting screwxand the pile. .Heretofore,it had :been necessary -.to f remove the`entire armature assembly. .'I-'hisfrequiredthat the `.unit be dismantled in order ffor thevarmature assembly .to be accessible.

`Further, `.providing .the contact .plug with .an insertdoes not cutdown.on the `.contact areaas the lcarbon discs 12 .have :a hole vthrough the center.

-Although onlyione embodiment of the inventinn :has fbeen illustrated fand described, .various chantes `in the :form .and rrelative arrangement 'Ofihhesprtswhich will nOw'aDPearizo-thosegskilled in the art may be made without departingfrom thescopeofthezmvention.

while holding said armature assembly against saidpressure to remove said contact button.

2. A method for removing a contact button :from a fcupeshaped holder of an armature aslsembly-ofacarloon,pile regulator having a housging, afcarhon'pile,y and a contact screw, said carbon pile `being supported between said contact screw an'd said contact button; said method comprising'the steps of removing said contact screw, removing said pile through the opening caused by .the ,removal of `said screw, inserting means through said opening-tofgrip said contact button and press against `said cup-shaped holder, and applying ,pressure to -said contact4 button relative to vsaidrupfshape'd .holder to remove said button from said holder.

WILLIAM G. NEILD.

References 'Cited in the file of this patent `UNITED .STATES PATENTS Number Name :Date

:841,232 Danalet al Jan. 15, 1907 555,688 Nubson. -Sept. 22,1925 128731250 Adolph Aug. 23, 1932 2,486,978 :Rady etal Nov. ,1, 1949 

